使(在SqlDataSource中使用FilterExpression的GridView和DropDownList)在不使用JavaScript重新加载页面的情况下工作
如何在SqlDataSource中使用FilterExpression使带有DropDownList的Filter GridView工作,而不使用JavaScript重新加载页面使(在SqlDataSource中使用FilterExpression的GridView和DropDownList)在不使用JavaScript重新加载页面的情况下工作,javascript,asp.net,gridview,filtering,sqldatasource,Javascript,Asp.net,Gridview,Filtering,Sqldatasource,如何在SqlDataSource中使用FilterExpression使带有DropDownList的Filter GridView工作,而不使用JavaScript重新加载页面 <asp:DropDownList ID="ddlCountries" runat="server" AutoPostBack="True" DataSourceID="DropDownDataSource" DataTextField="SC" DataValueField="SC" AppendDat
<asp:DropDownList ID="ddlCountries" runat="server" AutoPostBack="True" DataSourceID="DropDownDataSource"
DataTextField="SC" DataValueField="SC" AppendDataBoundItems="True">
<asp:ListItem Text="All " Value="" />
</asp:DropDownList>
<asp:SqlDataSource ID="DropDownDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:CountConnectionString %>"
SelectCommand="SELECT [SC] FROM [CountTable]"></asp:SqlDataSource>
<asp:GridView ID="GridView1" HeaderStyle-BackColor="#3AC0F2" HeaderStyle-ForeColor="White"
runat="server" AutoGenerateColumns="False" DataSourceID="GridDataSource"
DataKeyNames="ID">
<Columns>
<asp:BoundField DataField="ID" HeaderText="ID" ItemStyle-Width="150"
InsertVisible="False" ReadOnly="True" SortExpression="ID" />
<asp:BoundField DataField="SC" HeaderText="SC" ItemStyle-Width="150"
SortExpression="SC" />
<asp:BoundField DataField="Traffic" HeaderText="Traffic"
SortExpression="Traffic" />
</Columns>
<HeaderStyle BackColor="#3AC0F2" ForeColor="White"></HeaderStyle>
</asp:GridView>
<asp:SqlDataSource ID="GridDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:CountConnectionString %>"
SelectCommand="SELECT * FROM [CountTable]" FilterExpression="SC = '{0}'">
<FilterParameters>
<asp:ControlParameter Name="SC" ControlID="ddlCountries" PropertyName="SelectedValue" />
</FilterParameters>
</asp:SqlDataSource>